Ask HN: Which skills best enhance career prospects?

My startup has failed miserably and I've lost all my (and my wife's) money - I need to get a job, fast. The problem is my CV/Resume is unconventional. I have a degree from a top-tier university but in Physics rather than CS. My first job was unconnected to the tech scene (7 years in military intelligence) and although I've been coding since I was a kid, my only "commercial" coding experience is 3 years in my own 1-man (failed) startup so I don't even have someone to approach for a reference. Therefore, as well as searching for jobs, I need to learn some new skills to become a more tempting prospect for employers. Which skills offer the best employment prospects? Should I learn new languages and frameworks or instead deepen my language-agnostic knowledge (e.g. algorithms, Big O, etc)? My current primary skills are javascript, AJAX, OO PHP, MySQL, MVC frameworks (I've written my own as well as playing with others) and HTML/CSS (incl canvas, etc). My best skill is that I learn quickly, but clearly I don't have time to replicate an entire CS degree and so need to focus on the skills that will help most. Alternatively, given that I have leadership training and experience managing teams (approx 25 strong), would I be better off focusing on non-coding skills/methodologies and trying for a product manager role? (If it matters, I'm in the UK but presumably the same skills are in demand everywhere.)